Answer:
Step-by-step explanation:
(-3/9 + 4/3)+ a = 0
first solve our terms in the parentheses by adding them
to do this we have to find the lcd ( lowest common denominator)
9 works for both so I multiply both halves of 4/3 by 3 to get my denominator to 9 the other fraction is already at a denominator of 9 so we leave it alone
(-3/9 + 12/9)+ a=0
then add
(9/9)
9/9=1 SO WE SIMPLIFY
1+a=0
now we isolate our variable (a) to do this we subtract 1 from both sides of our equals sign to get the answer
a=-1
hope this helps
Slope: (6-(-6))/(2-(-4))=12/6=2
y=2x+b
next, find b: 6=2*2+b =>b=2
so the equation is y=2x+2
Answer:
Step-by-step explanation:
m = number of minutes
$ 8 monthly fee + 19 cents per minute
the expression for this is : 8 + 0.19m
$ 25 monthly fee and 14 cents per minute
the expression for this is : 25 + 0.14m
to find out when they will be equal, just set them equal to each other and solve for m, the number of minutes
8 + 0.19m = 25 + 0.14m .....subtract 0.14m from both sides
8 + 0.19m - 0.14m = 25......subtract 8 from both sides
0.19m - 0.14m = 25 - 8.....combine like terms
0.05m = 17...divide both sides by 0.05
m = 17 / 0.05
m = 340 <==== they are both the same at 340 minutes
The area is Base * Height
Area = b * h
b =12 3/4 in
h = 2 1/2 in
Area = 12.75 * 2.5 = 31.875 or 31 7/8 square inches.